I note that something like this is lisited in the forecast as low priority. I would think it is a good idea. My only suggestion is if you do make these then consider doing so in a way that the fonts/images or whatever for the UI elements are all editable so that the user could easily alter the style. In other words having checkboxes that looked like windows checkboxes might not be as appealing as if I could make them look like wood, steel etc by changing a graphic.

Good luck.